Radio continuum of galaxies with H${}_2$O megamaser disks: 33 GHz VLA data

Abstract

We investigate the nuclear environment of galaxies with observed 22 GHz water megamaser in their subparsec edge-on accretion disks, using 33 GHz (9mm) radio continuum data from VLA, with a resolution of ~ 0.2-0.5 arcsecs, and relate the maser and host galaxy properties to those of its radio continuum emission. Eighty-seven percent (21 out of 24) galaxies in our sample show 33 GHz radio continuum emission at levels of 4.5-240 $\sigma$. Five sources show extended emission, including one source with two main components and one with three main components. The remaining detected 16 sources exhibit compact cores within the sensitivity limits. Little evidence is found for extended jets (>300 pc) in most sources. Either they do not exist, or our chosen frequency of 33 GHz is too high for a detection of these supposedly steep spectrum features. In only one source among those with known maser disk orientation, NGC4388, we found an extended jet-like feature that appears to be oriented perpendicular to the water megamaser disk. Smaller 100-300 pc sized jets might also be present, as is suggested by the beam-deconvolved morphology of our sources. Whenever possible, central positions with accuracies of 20-280 mas are provided. A correlation analysis shows that the 33 GHz luminosity weakly correlates with the infrared luminosity. The 33 GHz luminosity is anticorrelated with the circular velocity of the galaxy. The black hole masses show stronger correlations with water maser luminosity than with 1.4 GHz, 33 GHz, or hard X-ray luminosities. Furthermore, the inner radii of the disks show stronger correlations with 1.4 GHz, 33 GHz, and hard X-ray luminosities than their outer radii, suggesting that the outer radii may be affected by disk warping, star formation, or peculiar density distributions.

arXiv comment18 pages, 10 figures, Accepted for publication in A&A

References in corpus (51)

• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• HyperLEDA. III. The catalogue of extragalactic distances
• Mid-Infrared Selection of AGN with the Wide-Field Infrared Survey Explorer. I. Characterizing WISE-Selected AGN in COSMOS
• How Do Massive Black Holes Get Their Gas?
• A 4% Geometric Distance to the Galaxy NGC4258 from Orbital Motions in a Nuclear Gas Disk
• Toward a New Geometric Distance to the Active Galaxy NGC 4258. III. Final Results and the Hubble Constant
• The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks
• Precise Black Hole Masses From Megamaser Disks: Black Hole-Bulge Relations at Low Mass
• Jet directions in Seyfert galaxies
• Unveiling obscured accretion in the Chandra Deep Field South
• A Dynamical Model for the Formation of Gas Rings and Episodic Starbursts Near Galactic Centres
• The Megamaser Cosmology Project: IV. A Direct Measurement of the Hubble Constant from UGC 3789
• The Nature of the Nuclear H2O Masers of NGC 1068: Reverberation and Evidence for a Rotating Disk Geometry
• An Imaging Survey of Early-Type Barred Galaxies
• Isotropic Luminosity Indicators in a Complete AGN Sample
• Motion and Properties of Nuclear Radio Components in Seyfert Galaxies Seen with VLBI
• Megamaser Disks Reveal a Broad Distribution of Black Hole Mass in Spiral Galaxies
• Jet directions in Seyfert galaxies: Radio continuum imaging data
• A Close Nuclear Black Hole Pair in the Spiral Galaxy NGC 3393
• The Relative Orientation of Nuclear Accretion and Galaxy Stellar Disks in Seyfert Galaxies
• Radio Variability in Seyfert Nuclei
• The Megamaser Cosmology Project. II. The Angular-Diameter Distance to UGC 3789
• New H2O masers in Seyfert and FIR bright galaxies
• NuSTAR observations of water megamaser AGN
• Feeding and feedback in the active nucleus of Mrk 1157 probed with Gemini Near-Infrared Integral-Field Spectrograph
• Broadband Observations of the Compton-thick Nucleus of NGC 3393
• Discovery of Water Maser Emission in Eight AGN with 70-m Antennas of NASA's Deep Space Network
• A Green Bank Telescope Search for Water Masers in Nearby Active Galactic Nuclei
• The Parsec-scale Accretion Disk in NGC 3393
• VLBA Continuum Observations of NGC 4258: Constraints on an Advection-Dominated Accretion Flow
• The incorrect rotation curve of the Milky Way
• A gravitationally lensed water maser in the early Universe
• The Megamaser Cosmology Project.IX. Black hole masses for three maser galaxies
• The Discovery of Water Maser Emission from Eight Nearby Galaxies
• Discovery of Water Maser Emission in Five AGN and a Possible Correlation Between Water Maser and Nuclear 2-10 keV Luminosities
• Searching for mid-IR obscured AGN in the CDF-N
• New Compton-thick AGN in the circumnuclear water maser hosts UGC3 789 and NGC 6264
• CHANG-ES VII: Magnetic outflows from the Virgo cluster galaxy NGC 4388
• Towards Precision Supermassive Black Hole Masses using Megamaser Disks
• Molecular Gas in Candidate Double Barred Galaxies I. The Diverse Morphology and Dynamics of NGC 2273 and NGC 5728
• The Megamaser Cosmology Project. VII. Investigating disk physics using spectral monitoring observations
• Using Megamaser Disks to Probe Black Hole Accretion
• Refining the M_BH-V_c scaling relation with HI rotation curves of water megamaser galaxies
• Water-Vapor Maser Disk at the Nucleus of the Seyfert 2 Galaxy IC 2560 and its Distance
• Radio properties of H2O maser host galaxies
• Deep Hα Observations of NGC 253: a Very Extended and Possibly Declining Rotation Curve?
• A Scaling Relation Between Megamaser Disk Radius and Black Hole Mass in Active Galactic Nuclei
• Circumnuclear Molecular Gas in Megamaser Disk Galaxies NGC 4388 and NGC 1194
• Optical and NIR spectroscopy of Mrk1210: constraints and physical conditions of the active nucleus
• GMRT and VLA observations of HI and OH from the Seyfert galaxy Mrk 1

Cited by in corpus (6)

• Searching for molecular gas in/outflows in the nuclear regions of five Seyfert galaxies
• The Megamaser Cosmology Project. XI. A geometric distance to CGCG 074-064
• Accretion disk versus jet orientation in H${}_2$O megamaser galaxies
• Water megamaser emission in hard X-ray selected AGN
• Estimating the mass-to-distance ratio for a set of megamaser AGN black holes by employing a general relativistic method
• IC 485:a new candidate disk-maser galaxy at $\sim$100 Mpc distance. Milliarcsecond resolution study of the galaxy nucleus and of the $H_{2}O$ megamaser